Why would a Vader/Fett little chat be of any use ? I mean, does Fett try to keep Luke alive at any point in the movie ? The idea sounds cool but nothing in the actual movie would be consistent with it.
He wraps him up with his arm cord thingy rather than just shoot him at one point on the skiff battle.
Then he stands up and starts shooting at him, prompting Chewie to warn Han about him.
Another 2011 change, what about the new insert shot of Han hitting Boba Fett’s jetpack, which has gone completely unexplained?